Partners' Equity and Cash Distributions (Tables)
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Distributions Made to Limited Partner, by Distribution
(in millions, except per unit amounts)
 
 
 
 
Quarter Ended
Record Date
Payment Date
Per Unit Distribution
Total Cash Distribution
March 31, 2015(1)
May 13, 2015
May 20, 2015
$
0.0912

$
9.2

June 30, 2015
August 13, 2015
August 20, 2015
0.1675

16.9

September 30, 2015
November 13, 2015
November 20, 2015
0.1725

17.4

December 31, 2015
February 11, 2016
February 19, 2016
0.1800

18.1

(1) The quarterly distribution for three months ended March 31, 2015 was prorated for the period beginning immediately after the closing of the IPO, February 11, 2015 through March 31, 2015.